Several migrants said they had recently arrived in Ciudad Juarez, Mexico after weeks of travel, only to find their CBP One appointments were cancelled.

The Trump administration has ended use of the border app called CBP One that allowed nearly 1 million people to legally enter the United States.

The US-Mexico border is effectively closed off to migrants seeking asylum in the United States within hours of President Donald Trump taking office, an extraordinary departure from previous protocols that has left many concerned migrants in limbo.

The United States began a mass deportation campaign, returning undocumented immigrants to Mexico through border checkpoints under an executive order signed by President Donald Trump on Monday in the hours immediately following his inauguration.

President Donald Trump's promises of mass deportations, which could bring batches of new arrivals fresh off the border bridges into Juárez, has Mexican law enforcement preparing to keep watch for potential trouble.

Hours after Trump’s inauguration, his administration canceled appointments allowing migrants to enter the U.S. to request asylum, leaving many of them stranded on the U.S.-Mexico border.

Nidia Montenegro fled violence and poverty at home in Venezuela, survived a kidnapping as she traveled north into Mexico, and made it to the border city of Tijuana on Sunday for a U.S. asylum appointment that would finally reunite her with her son living in New York.

General Jose Lemus, commander of Ciudad Juarez's military garrison, said the tunnel "must have taken a long time" to build, suggesting "it could have been one or two years".

The CBP One app has been highly popular, functioning as an online lottery system that grants appointments to 1,450 people daily at eight border crossings. These individuals enter the U.S. under immigration "parole," a presidential authority that Joe Biden has exercised more frequently than any other president since its creation in 1952.

Migrants, activists, and religious organizations remained on high alert on Friday at one of the main border crossings between Mexico and the United States in Ciudad Juárez, as Donald Trump prepares to take office again on Jan.

Data shows birthright citizenship hasn't changed much since 2000 as Trump wants to end it for children of illegal immigrants.

In his speech at the U.S. Capitol, Trump outlined a flurry of executive orders he plans to sign during his first day back in office. President Trump signed an executive order Monday aimed at protecting TikTok from a new law banning the app. Legal experts say this order still leaves the company on shaky ground.